summaryrefslogtreecommitdiffstats
path: root/etc/rc.d/hostid
blob: 37ea173013b9e4193f25da3c2da4b5d66ac4883f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
#!/bin/sh
#
# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
# Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

# PROVIDE: hostid
# REQUIRE: sysctl
# KEYWORD: nojail

. /etc/rc.subr

name="hostid"
start_cmd="hostid_start"
stop_cmd=":"
reset_cmd="hostid_reset"
extra_commands="reset"
rcvar="hostid_enable"

hostid_set()
{
	uuid=$1
	# Generate hostid based on hostuuid - take first four bytes from md5(uuid).
	id=`echo -n $uuid | /sbin/md5`
	id="0x${id%????????????????????????}"

	# Set both kern.hostuuid and kern.hostid.
	#
	check_startmsgs && echo "Setting hostuuid: ${uuid}."
	${SYSCTL} kern.hostuuid="${uuid}" >/dev/null
	check_startmsgs && echo "Setting hostid: ${id}."
	${SYSCTL} kern.hostid=${id} >/dev/null
}

valid_hostid()
{
	uuid=$1

	x="[0-9a-f]"
	y=$x$x$x$x

	# Check against a blacklist before
	# accepting the UUID.
	case "${uuid}" in
	00000000-0000-0000-0000-000000000000)
		;;
	00020003-0004-0005-0006-000700080009)
		;;
	03000200-0400-0500-0006-000700080009)
		;;
	07090201-0103-0301-0807-060504030201)
		;;
	11111111-1111-1111-1111-111111111111)
		;;
	11111111-2222-3333-4444-555555555555)
		;;
	4c4c4544-0000-2010-8020-80c04f202020)
		;;
	58585858-5858-5858-5858-585858585858)
		;;
	890e2d14-cacd-45d1-ae66-bc80e8bfeb0f)
		;;
	8e275844-178f-44a8-aceb-a7d7e5178c63)
		;;
	dc698397-fa54-4cf2-82c8-b1b5307a6a7f)
		;;
	fefefefe-fefe-fefe-fefe-fefefefefefe)
		;;
	*-ffff-ffff-ffff-ffffffffffff)
		;;
	$y$y-$y-$y-$y-$y$y$y)
		return 0
		;;
	esac

	return 1
}

hostid_generate()
{
	# First look for UUID in hardware.
	# If not found, fall back to software-generated UUID.
	uuid=`uuidgen`
	hostid_set $uuid
}

hostid_reset()
{
	hostid_generate
	# Store newly generated UUID in ${hostid_file}.
	echo $uuid > ${hostid_file}
	if [ $? -ne 0 ]; then
		warn "could not store hostuuid in ${hostid_file}."
	fi
}

hostid_start()
{
	# If ${hostid_file} already exists, we take UUID from there.
	if [ -r ${hostid_file} ]; then
		read saved_hostid < ${hostid_file}
		if valid_hostid ${saved_hostid}; then
			hostid_set `cat ${hostid_file}`
			exit 0
		fi
	fi

	# No hostid file, generate UUID.
	hostid_generate
}

load_rc_config $name
run_rc_command "$1"
OpenPOWER on IntegriCloud